How does Boxer react to Squealer's claim that Snowball was on Jones's side all along? What does this reaction reveal about the development of Boxer's character?
He quickly accepts the news as truth, as he always does, which shows that he remains an ignorant, blindly loyal work horse
He becomes puzzled and challenges Squealer's claims with his own memory of Snowball's award and injury, which shows him thinking for himself for the first time
He refuses to believe it until Squealer explains that Napoleon says its true, at which point Boxer quickly and completely accepts the news; this shows that he still sticks by his "Napoleon is always right" mantra